National Center For Competency Testing (NCCT) Practice Exam

How long should the heel be warmed before capillary blood collection?

1-2 minutes 3-5 minutes 6-8 minutes 10 minutes

Correct Answer:

3-5 minutes

Explanation:

Warming the heel increases blood flow to the area by dilating the capillaries, which makes capillary blood collection easier and helps you obtain an adequate sample with less discomfort. The recommended duration is about three to five minutes. Warming for a short time may not boost perfusion enough, making it harder to obtain a good blood drop. Warming for much longer than needed can irritate or damage the skin and potentially affect the sample. Use a clean, warm, moist pad at a safe temperature and apply it for roughly three to five minutes before puncturing.

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